Sheldon Goldstein
Department of Mathematics, Rutgers University
New Brunswick, NJ 08903, USA
July 23, 1997
The concept of `measurement' becomes so fuzzy on reflection that it is quite surprising to have it appearing in physical theory at the most fundamental level. ... [D]oes not any analysis of measurement require concepts more fundamental than measurement? And should not the fundamental theory be about these more fundamental concepts? (Bell 1981 [1, page 117])